Extensible records with structural subtyping in HOL.  See Tools/record_package.ML for the actual implementation.
Extensible records with structural subtyping in HOL.  See
Tools/record_package.ML for the actual implementation.

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle